This is my first real addon, just made it as a fun project and to solve a frustration of my own. I thought I might share it with everyone here as well
If you've ever had to search through your bags for a grey to destroy so that you can loot an item, this addon is for you - it will show up in those cases and show you which items to delete.
The addon is called Delete Cheapest Item and it's available on Curse: https://www.curseforge.com/wow/addons/delete-cheapest-item
This is v1.0, so it's pretty basic and could potentially have a bug or two. Thanks and enjoy!
Does it also show the value of the item you want to loot? What if the item-to-loot is cheaper than the cheapest item in your bags?